4:55 a.m.: After watching air quality all night, four teams of eight rescue workers re-enter the mine early Thursday.
9:30 a.m.: Rescuers withdraw again when repeated readings of carbon monoxide, methane and other gases show an explosive mixture. Crews resume drilling boreholes to speed ventilation.
State officials check impoundments nearby to determine if they were affected by the blast. Family members of Marty Bennett, who died in the Sago disaster, drive to Montcoal to deliver a letter and to support miners' families.
Friday, April 9
12:30 a.m.: Two rescue teams enter the mine again.
7 a.m.: Rescuers withdraw again after they encounter smoke.
Workers pump nitrogen into the mine to make the air less combustible. Federal officials say they had been requesting the company bring in nitrogen supplies since Tuesday.
11 a.m.: Funerals are held for miners Benny Willingham in Mullens, Steven J. Harrah in Shady Spring and Deward Scott in Whitesville.
1:45 p.m.: In the White House Rose Garden, President Obama talks of his conversations with family members, praises the courage of rescuers and says, "We're praying for a miracle."
2 p.m.: Funeral for Carl Accord is held in Beckley.
2:30 p.m.: Two eight-member rescue teams rush back into the mine in an attempt to finally reach a sealed refuge chamber where the four miners could be. Rescuers expect the journey deep into that part of the mine to take as long as 4 1/2 hours.
3 p.m.: The 96-hour mark passes. Refuge chambers were designed for 26 people, so it is possible that fewer people could survive in one longer, if they made it to the chamber.
11:30 p.m.: Rescuers find the body of the last missing miner. The refuge chambers had not been used.
Saturday, April 10
12:30 a.m.: Gov. Manchin announces that all four missing miners are dead, bringing the death toll to 29. None of the miners underground had a chance to use the self-contained self-rescuers, Stricklin said.
"This journey has ended, and now the healing will start," Manchin said.
- Staff reports